Submission #224770

#	Time	Username	Problem	Language	Result	Execution time	Memory
224770		MKopchev	Teams (CEOI11_tea)	C++14	0 / 100	375 ms	37500 KiB

tea

#include<bits/stdc++.h>
using namespace std;

const int nmax=1e6+42;
int n;
pair<int/*low*/,int/*id*/> inp[nmax];

pair<int/*max*/,int/*id*/> pref_max[nmax];

int dp[nmax];
int parent[nmax];

int main()
{
    scanf("%i",&n);
    for(int i=1;i<=n;i++)
    {
        scanf("%i",&inp[i].first);
        inp[i].second=i;
    }

    sort(inp+1,inp+n+1);

    pref_max[0]={0,0};
    dp[0]=0;

    for(int i=1;i<=n;i++)
    {
        dp[i]=-1;
        parent[i]=-1;

        if(i-inp[i].first>=0)
        {
            parent[i]=pref_max[i-inp[i].first].second;
            dp[i]=pref_max[i-inp[i].first].first+1;
        }

        pref_max[i]=max(pref_max[i-1],make_pair(dp[i],i));
    }

    printf("%i\n",dp[n]);
    int pos=n;

    for(int i=dp[n];i>=1;i--)
    {
        printf("%i",pos-parent[pos]);
        for(int j=parent[pos]+1;j<=pos;j++)
        {
            printf(" %i",inp[j].second);
        }
        printf("\n");
        pos=parent[pos];
    }
    return 0;
}

Compilation message (stderr)

tea.cpp: In function 'int main()':
tea.cpp:15:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i",&n);
     ~~~~~^~~~~~~~~
tea.cpp:18:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i",&inp[i].first);
         ~~~~~^~~~~~~~~~~~~~~~~~~~

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